Saiki Kusuo no Ψ Nan: Season 2, Episode 17

2 - 17: He's Back! The Brother's Five Directives + Let's Go to the Zoo! + The Disastrous Work of a New Manga Author + The Disastrous Lives of the Kaidou Brothers + A Girl's Makeover

Kusuo receives an explosive surprise from his brother Kusuke, who has a challenge for him. If Kusuo fails, Kusuke will expose him as a psychic to the world via firework.